Focal Loss for Dense Object Detection
Thehighestaccuracyobjectdetectorstodatearebasedonatwo-stageapproachpopularizedbyR-CNN,whereaclassifierisappliedtoasparsesetofcandidateobjectlocations.Incontrast,one-stagedetectorsthatareappliedoveraregular,densesamplingofpossibleobjectlocationshavethepotentialtobefasterandsimpler,
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